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Potential of anther culture in breeding for Fusarium head blight resistance in wheat

Potential of anther culture in breeding for Fusarium head blight resistance in wheat

Cereal Research Communications 21(2-3): 141-147

Androgenic responses of Triticum aestivum cvs. Marquis, a Fusarium head blight (FHB) susceptible Canadian cv., and Wangshui Bai, a FHB resistant Chinese cv., and their F1 hybrids are reported. Marquis anthers responded well in culture with a callus induction frequency (CIF) of 19.7%, and produced 3.9 green plants/100 plated anthers but Wangshui Bai was a poor responder, having a CIF of 4.4% and produced only albino plants (1.4/100 anthers) . Nevertheless, doubled haploid (OH) plants were recovered from the F1 progeny of reciprocal crosses of these cultivars. Anthers from the first three emerging spikes of F1 hybrids (Marquis times Wangshui Bai) showed responses intermediate to the parental lines; CIF 14% and green plant regeneration of 0.3/100 anthers. Anthers from later emerging spikes had CIFs of 5-8% and zero green plant production. Screening of the OH hybrids for FHB resistance by an in vitro growth assay and subsequently by field inoculation trials indicated that approximately one half of the OH lines were resistant to FHB. This unexpectantly high ratio of resistant lines suggests that the susceptible cv. Marquis must also carry minor resistance factors that were transferred to the OH lines. It is concluded that the OH approach will be useful for genetic analyses of resistance and for breeding Fusarium resistance into Canadian cultivars.

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